package com.sky.service.impl;

import com.alibaba.fastjson.JSON;
import com.alibaba.fastjson.JSONObject;
import com.sky.constant.MessageConstant;
import com.sky.dto.UserLoginDTO;
import com.sky.entity.User;
import com.sky.exception.LoginFailedException;
import com.sky.mapper.UserMapper;
import com.sky.properties.WeChatProperties;
import com.sky.service.UserService;
import com.sky.utils.HttpClientUtil;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;

import java.time.LocalDateTime;
import java.util.HashMap;

@Service
public class UserServicelmpl implements UserService {


    @Autowired
    private UserMapper userMapper;
    @Autowired
    WeChatProperties weChatProperties;

    //获取微信服务接口地址
    public static final String WX_LOGIN="https://api.weixin.qq.com/sns/jscode2session";

    /**
     * 微信登录
     * @param userLoginDTO
     * @return
     */
    public User wxLogin(UserLoginDTO userLoginDTO) {
        //调用获取penid方法
        String openid = getOpenid(userLoginDTO.getCode());
        //判断openid是否为null，则报出异常
        if(openid==null){
            throw new LoginFailedException(MessageConstant.LOGIN_FAILED);
        }
        //判断当前用户是否为新用户 为新用户则授权注册,获取用户注册时间，openid
        User user= userMapper.getByopenid(openid);
        if(user==null){
            user= User.builder().createTime(LocalDateTime.now()).openid(openid).build();
            userMapper.insert(user);
        }
        return user;
    }

    private String getOpenid(String code){
        //封装请求参数
        HashMap<String, String> map = new HashMap<>();
        map.put("appid",weChatProperties.getAppid());
        map.put("secret",weChatProperties.getSecret());
        map.put("js_code",code);
        map.put("grant_type","authorization_code");
        //获取微信服务端请求
        String json = HttpClientUtil.doGet(WX_LOGIN,map);
        JSONObject jsonObject=JSON.parseObject(json);
        //解析openid
        String openid = jsonObject.getString("openid");
        return openid;
    }
}
